stylerforwpforms

Try the following code.. your form doesn’t have wpforms-container-full .. instead of that you can use wpforms-container class.

Try the following code

div.wpforms-container .wpforms-form .wpforms-field.wpforms-field-textarea textarea {
width: 30px;! important:
}

Try adding the following code under Customizer -> Additional CSS

@media all and ( max-width: 768px ) {
     body div.wpforms-container-full .wpforms-field-email .wpforms-field-row-block {
        width: 100%;
        margin-left: 0;
    }
}

You can add a hidden field in your form and use {page_url} smart tag as its default value. It will automatically populate the hidden field with the URL of the page in which the form is embedded.

For more details about smart tags please check the below URL:

https://wpforms.com/docs/how-to-use-smart-tags-in-wpforms/